Official website of the Mayor and City Council of the City of Mackay, Idaho 83251

Welcome to Mackay Top of Idaho

Mackay’s new “Lost River Museum”, operated by the South Custer County Historical Society, opened May 2017 on Main Street next door to the US Post Office.

The Museum houses a collection of historical artifacts and unique items donated by Mackay community and Lost River Valley residents. Its large display area is visitor friendly, well lighted, and handicapped accessible. Display artifacts are close at hand, easily viewed, and well interpreted. Features include a fully restored sheep wagon, a large, visitor interactive hard-rock mining exhibit, an extensive gallery of historic photos, and a large local newspaper and print shop exhibit.

There is no admission charge but donations are welcome. The museum is open May through September, each Friday and Saturday, 11:00 AM to 4:00 PM. Open at any time by appointment for groups of 4 or more by calling (208) 588-4500, 589-7847, 588-2257, or 588-3133.